%0 Journal Article %A Michael N. Dyer %T Groups with no infinite perfect subgroups and aspherical 2-complexes. %J Commentarii mathematici Helvetici %D 1993 %P 333-340 %V 68 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1993__68_2_140306/ %F CMH_1993__68_2_140306